Don't know about no modifications. But Summit lists 2 brands. They both come with spacers, and can be used in several apps. You can read the reviews & decide if you wanna go that way.
The Superior PA6062 is a bit cheaper. Some sites say this is no longer available, & Superior is out of business. Don't know if anybody still has 'em in stock, or not.
I suppose that if there were some cheap exact replacements, somebody would have responded. We ran the factory 8.2 BOP axles in several 12 sec strip cars & never broke one.
