Roy, I have no specific A65 bearing experience but I do know that SMR and any other reputable engine builder will give you a re-build to original or better spec bush. You don't have to get the roller bearing conversion if you go to SRM. My local engine builder (Rob Wardle in Gateshead) who helped me with my crank end feed (I do have the roller conversion on my A10) - said he had no problems building to original spec as long as you use the right bush (there are different versions available these days, solid, steel backed etc).
Worth a couple of phone calls - these guys will tell it like it is - it's thier business and reputation at stake.
There's been a load of discussion on the covenversion versus the bush and the way I understand it - unless you have a good reason to go roller (high or hard mileage / racing) - it is sometimes best to stick with bush - especially if you've not had any real problems with it so far.
Good news is you won't be stuck, you do have the choice - the world's your oyster.
Good luck and let us know what you go with and how it turns out.
Cheers Raymond.