can you get tem for a standard cam.
you can order roller bearings from any industrial bearing supplier. tell them the journal diameter of your cam and then bore the block accordingly. The question then becomes, can your block accept the larger bore? In my Brodix block, in order to bore it for the 55mm bearings i had to order a +.400-inch rasied cam block so that the bore didn't go too far up into the lifter journals.
as for 9.800 inch (standard) deck height chevy blocks...i have no clue if it will work, you'd have to ask a pro engine builder.