Yep - I can vouch for RUMC too. Not a bricks and mortar store I don't think, but good service. For a while they were the only place you could get the highly regarded bowl back Clearwater ukuleles too.
Just to confirm the others' stories of good service, I have one of those very ukes Barry mentions: what I call my "long-neck baritone" - despite being advertised (online) as having a 19" neck, the neck on the uke that arrived was a whole 4" longer(23")! Everyone was telling me I'd bought a tenor guitar by mistake!
Anyway, as soon as I became aware of the unusual dimensions, I rang them up (they're based in Co. Durham, in the NE of England), initially to confirm that I hadn't been sent a tenor guitar by mistake.
Immediately I outlined the reason for my query, they offered to take it back - even though it was 'B-stock'. To be fair, under the terms of the UK's 'Sale of Goods Act', they would have been obliged to if I'd insisted, as the article 'was not as described', but the offer to take back was immediate and unprompted (I think I was actually speaking to the proprietor). The first thing he said was "Is it satin finish or hi-gloss?" "High-gloss" "Ah! I know what's happened here!". He apologised for the confusion, and gave me the whole story of the history of these ukuleles. Long story short, the unannounced change in scale-length was a mix-up on the part of the suppliers, but it was definitely a baritone ukulele.
Once I'd had this confirmed (that it was a baritone ukulele, albeit of unusual dimensions, and not a tenor guitar, I decided not to take him up on his offer and kept it.* Since in all other respects, its other characteristics were the same (eg., the body is the same dimensions) as their 19"-neck baritones, and on the basis that you can have a 'long-neck' soprano, I've decided I've got myself - by accident! - a 'long-neck' bari!
As to it being 'B-stock', my friend, the incomparable
Philippe Dubreille, checked it out for me. Between us, we found one tiny drop of glue on the headstock, which polished out in a second. That drop of glue knocked some £120 off the price! So it's really worth watching their site for B-stock specials.
http://www.rumc-ltd.com/about-us/
*The uke originally came fitted with baritone gCEA strings (tuned gCEA, but one octave lower than standard. This is my review here:
Clearwater Roundback Single-Cutaway Electro-Acoustic Baritone: Review
I didn't get on with those strings and (because of the length) replaced them with classical guitar ADGB strings tuned up to DGBE:
Clearwater Baritone Ukulele Pt 2 (linear DGBE tuning)
Those strings improved the sound some, but the D string (tuned G) kept giving way, so in the end I went for dedicated (linear DGBE) baritone strings. I used Living Water. In spite of the extra length, they proved to be fine, and really improved the tone yet again. Didn't bother reviewing it a 3rd time, but to give you a taste, here's
Mystery Train.