Greetings,

Here is my .02

Take a length of chain, drape a loop of chain around crossmember on each side of the relay.... place a flat piece of steel under the relay (suspended in the two loops of chain) then, place a bottle jack on the suspended plate. (thus, making a "home made" press that uses the chassis against itself so you can jack the relay up and out)

Good luck!

Peace,
Art