Get a used MPS w/Pulley from the "For Sale" areas on our vast amount of forums...
$40-$60 most likely
Find someone with a puller, buy him a case of beer, help him hold tools while he swaps your pulley with the MPS Hub...
Call it a day
Even if you need to buy a 2nd pulley, used, looking $40 more at max?
So, $55-$125...