I am trying to not get ripped of by plumbers. so I am gathering as much info as possible. i have this old (1930) toilet that they dont make parts for anymore. there is also this problem of the rough being oddball. the bathroom was built around the toilet I am told. so the new toilet has a bigger measurement 7 or 8. old one is 5 or 6. is there an extender or some way around a huge bathroom remodel. thanks.

It doesn't sound like anyone is trying to rip you off. This is a very common problem in older homes. I have never seen a 5 or 6 inch rough-in but nothing surprises me anymore. Rough-in is the distance between the finished wall and the center of the drain pipe in the floor, by the way.

If you are sure the toilet needs to be replaced and can't be repaired, then it sounds like the only option is to replumb the flange so a newer toilet will fit.

You can purchase a offset flange that needs to be connected to the old drain. That may correct this issue.
As far as parts for the toilet, I never heard that you cannot get parts for this important home appliance. I ams sure if you go to a older plumbing supply house. One that has been around for a long time they may have the parts to replace what ever needs to be changed. What I think is the toilet is so old, the plumbers may be afraid of touching it as the unit becomes brittle with age and they do not want to end up buying a new one if the tank or base braaks while repairing it. Most new plumbers do not want to mess with old stuff. It gets them dirty. Everyone likes new as it goes together better and has a warranty if anything breaks.