Hello Paul,
No, sorry, we are the only ones to make a set like that. I can't really understand why, as that tuning is a natural for a Baritone.
We sell with Paypal, but then so do a lot of others. Is it not working correctly?
I know that we don't sell a "Tenor Ukulele" set, or in this case a "Baritone Low G GCEA No-Wound" set; that's because this set is also a great set for a Tenor in low 4th D tuning. I guess we could just take all our sets and package them with 2-4 different names? At any rate here is the link to the strings you are looking for:
http://www.southcoastukes.com/stringuide_files/linuke.htm
The common perception in the musical world is that ukulele players are not true musicians at all, and I know that a lot of people are attracted to the ukulele because of it's relative simplicity.
I don't think, however, that the ukulele is a "simple instrument for simpletons". Tuning terminology in the ukulele world is often imprecise, misleading or innacurate. On the first page of our string section, and on every single string page, we practically implore people to take a few moments to read the page on "Tunings & Terminology":
http://www.southcoastukes.com/stringuide_files/tunings.htm
Take just a little time to read through it - once only. We've tried to put a basic understanding of tunings into as short a space as possible. It doesn't seem to me like our site would take much thought after digesting this, and it would help you in your choice of strings and your uderstanding of your instrument whether you bought from us or not.