Hi Eric,
Albert is usually right in such early luger matters; you may not want to discount his advice. But it is only $ 3500 and it is your money and not really anyone else's business how it is spent.
FWIW...Here is a photo of an A&F carbine pouch in Kenyon's 1st. book "Lugers at Random" on page 402.
At the time it was photographed it belonged in the collection of luger book author Michael Reese.
From this photo, you can compare construction details of this Reese A&F carbine pouch to the "item" for sale with Tom/Ralph at Phoenix Investment Arms. Here is a link to the "item' for sale at PIA :
http://www.phoenixinvestmentarms.com/afcarrycase.htm
Some of the details I note on this Reese pouch that are not on the PIA offering are :
1. Totally different handle construction quality and style of handle.
2. The Reese pouch has its closure flaps re-inforced with metal studs.
3. The Reese pouch has larger closure flaps and the closure straps are sewn lower/down towards the ends of the flaps. The dimensions on the PIA item seem all wrong with the flaps too small and the straps sewn up too high towards the top of the flaps.
4. The style of the A&F log stamping on the Reese pouch is a different style that on the PIA pouch. (I have posted photos of both styles of A&F logo's used on other holsters of the time.
5. The shape of the closure straps where they are sewn to the flaps on the Reese pouch have a unique shape that is not duplicated on the PIA offering.
Here are the A&F logo photo scans from Euguene Bender's large book on luger holsters; showing two styles of A&F logos :
