D68U Pony Big End Bearings - source?

Hi Team. I need pony big end bearings. I managed to order one pair of 6B2298 from CAT. They did say they could get them made with a 90+day lead time but after waiting that long, they seem to have lost track of the order and nothing seems to be on the way... Any ideas for how I can get a set? Is it a terrible idea to shim out old bearings?

There are some available from "machinery trader parts " website.

Are you looking for std. or oversize? Reason I ask is std. are often easily available but requires you to build up your crank. That's what I did with my 5U main engine crank for the front journal

Thanks. Yes, ideally they are oversized. I am still having trouble sourcing any - even standard (made worse by being in Australia) but I will try to call some places in the US tomorrow. Thanks