[Locky]

I'm always low on cash so im a great believer in repairing when a replacment is pricey. Luckily i have machining equipment available to me. I think I would be tempted to machine off the broken prongs and slightly thin the base down in the mill. Make some new prongs out of steel or stainless channel then drill and tap them back onto the milled base with some countersunk Allen bolts.