I recently bought this '36 Elgin Oriole to restore and the handlebars were already swinging loose. I thought they just needed tightening. When I was disassembling the bike last night, I discovered the stem is actually broken. Ugh. Thankfully and luckily, I also have the piece that's broken off. It came off with the screw as I removed it (Believe me, no forcing took place, the head was all WD40'd up and came right off). Looking for suggestions on the best way to remedy this?