Sillydog, S. Sumner and BigBill: Sillydog - the 9mm is actually a neckless 7.65mm Luger, not a neckless 30 Mauser/7.62x25mm/Borchart round. Actually, all Georg Luger did was lop the neck off his 7.65mm Luger cartridge and call it the 9mm Parabellum.
S. Sumner, you are correct about the Borchart being one of the strangest looking but most accurate early semi-autos there is. It is a strange one alright and I shot one a bunch of years ago. They appear somewhat ungainly but actually fit well into the hand. You are also correct about the dimensional similarities betwixt the three cartridges but the Borchart round is more in the ballistic company of the 7.65/30 Luger. Also, you said it yourself - the 7.62 has a serious overpenetration problem that a nice hollowpoint would solve, and that's the direction I intend to go. You also mentioned you would not carry it for self defense but I think it was the overpenetration issue that may have formed your intent here.
I know both pistols, the CZ and the Tok are old designs, and the cartridge is a powerhouse with overpenetration problems but gee fellas, we go hog wild for a 1911 (check the date there) with a known overpenetration issue with ball ammo rather than a 1933 design with similar ballistic concerns.
I once wrote to Massad Ayoob about the Tok and the 7.62 and his response was that the cartridge and pistol were obsolete designs - all this from a 1911 fan, go figure. I would love to see an American company produce a Tok type semi auto in different calibers - there is a lot to be said for the integral hammer/trigger group and guide rails to allow for proper functioning even with bad magazines. Now, if you need a bigger bore you can always go with a 9mm or if you can find it, a 38 Super bbl.
BigBill - check out your next gun show, someone in the NE will always have a Borchart, and most often a bunch of 9mm or even 30 caliber Lugers. Also, I think it may still be out there, some dealer has a long barrelled Walther P-38, with something like an 8" bbl, not a bad cob job but more an interesting oddity. HTH and M2C. Mikey.