I have one from a 323
No idea if it's the same tank, but I have an alcohol tank I removed from my P 323. It's a vertical cylinder, looks to be about 2 gallons. If you think it would help I can get pictures though it might take a few days. The tank is in my barn and I'm not sure how much other stuff has to be moved to get at it. Happy to check it out if it might help. If it's the one you're looking for it's yours if you need it.
Geoff