I never tried one. They only started selling them at end of Nov. 2016.
I have one of the original Fluke bags, as well as one of the TKL triangular padded bags, and while the Fluke/Flea is robust, the bags DO NOT impress me at all. To little padding, i.e. too thin and more like a rain cover than anything else, but I am paranoid about cases.
Even so, a nice step up without all the weight of a hard foam case might be one of the Lanikai 'HARD BAGS'. I have one that I keep a baritone in.
They have a nice rigid internal layer, and all layers have 25mm
SOFT foam (if the Fluke original case even has 5mm padding I'd be surprised), the whole thing is like felt lined and you can move the supports around like with a Fusion bag. Has backpack straps that can hide away too and a very sturdy handle. I've only seen the 'floral' and 'tribal' colors/patterns.
I've seen the Lanikai hard bags for tenors sell for $40-60 depending upon vendor...
http://lanikaiukuleles.com/product/lanikai-sidekick-printed-ukulele-hard-bag/
https://www.amazon.com/gp/product/B007R8KB52
If you still want an original MFC bag, I'd recommend adding some padding, and the TKL bag is weak for the money when you can get a tenor-sized Uke Crazy style canvas-covered hard foam case from $30-50 depending upon vendor. Yes a Fluke and Flea will in fact fit inside one of these cases (
Uke Crazy style canvas-covered hard foam case). I've done it and have several of each set up this way.
I have bough several from Empire Music in Canada, shipped to NJ, and they are about the same as the Lanikai, Musicians Gear or even the KALA, likely made in the same Asian factory...
These are $30 + $5 shipping...
http://empiremusic.net/index.php?route=product/product&path=26_342&product_id=1894
These cases are all lighter weight than a canvas or tolex covered hard plywood case, but the Lanikai Hard Bag feels less bulky because it is not as rigid as the canvas-covered foam case.
Please let me know if any of this is helpful to you and if not I will do my best.