Hello Thags
I don't think he was saying that you or your club were a scam but that the dealership should be able to find the part without a vin. Anyway if you use the search feature you can usually find what your looking for.
Here's one: 1988 Supercharged T-Top - JT2AW16J2J0144569
and here is where i found it:
1988 Supercharged T-Top - JT2AW16J2J0144569
If that doesn't work for you let me know i'll try to find you another one but you could also try asking Aaron at Lithia Toyota.