the ignition key has V72E on it, and on of the door lock keys (the non-vw logo one) has 752 stamped on it.
The markings on your repro keys are of no use to you. You need to pull the door handle off and read the code from it. Same for the ignition switch since it's different.
Don't bother with the VW dealer, they are no help for our old VWs. With the key code from the handle/ignition, any good locksmith can cut you a key from that code.
CIP sells brass repro blanks that look like the original steel ones. If you buy those, you can take them to your locksmith and get them cut.
I believe it is coded as a T for transporter. At least thats the way the originals were
Although the T series keys were only used on Type 2s, the T does not stand for Transporter. It's just a meaningless letter.