Sure would

Would a Datsun Stanza rims be suitable?

Surely you can get some other rims for it even second hand. Many early Mitsubishi and Toyota Rims are also the same stud pattern.

no geminis arent the same pcd or offset

Best bet would be adaptor plate. However i hav heard of people taking rims from Holden Geminis and putting them on 1200's whether or not the offset is the same im unsure.
You should have no problem gettin a good adaptor plate. Or you could get your rims made to suit. They can do it. its just a matter of finding out who can do it.

Hi guys

I have 13" rims on my 120Y at the moment, but they need replacing as the rust has developed and therefore the tyres are not inflating correctly. I went to Tiger Wheel & Tyre (RIM shop) and enquired about buying a new set of 13" rims, but was told that the rims that they stock (for modern day cars) will not fit onto my 120Y, and that I would need an adaptor plate fitted. I don't really want to go down that route, so can anyone suggest what type of rim I can fit straight on, or do I need to go the adaptor plate route?

It is extremely hard to find parts here in South Africa, but any comments are greatly appreciated.

Also, I attempted to have the rims repaired, but seeing as they were stell, the shop couldn't give me a guarantee, and basically told me it would be more beneficial if I sourced new rims.

Thanks guys

Mark