Sometimes homemade is best.

My brother made the drum puller we still use that same puller almost 30 years later and we still make them for sale and offer them for rent.

They aren't pretty, but we abuse the hell out this tool. It is sometimes necessary to beat on the head of the bolt when the drum is stuck.

When our air guns won't remove the drum by themselves, we use a copper hammer and hit the head of the bolt. Then we use an air gun again and repeat until the drum is removed.

The original Volvo tool works in a pinch, but you have to beat on the "T" bar with a hammer instead of using an air gun or if you don't have 1, a breaker bar and cheater bar.
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Eric
Hi Performance Automotive Service (formerly OVO or Old Volvos Only)
Torrance, CA 90502
hiperformanceautoservice.com or oldvolvosonly.com