1st off, if you are really desperate to go bocking --emrgancy repair
Get some duct tape, masking tape --even loads of selotape --and basically tape yourself on also a bit of one of those roof rack webbing straps works
2nd they are pretty cheap, if not on the pro jump shop site pm webmaster she will advice
3rd you may now want to consider moving up to a higher spec 'binding' Ive just ordered some snowboard style bindings at £25 ( tho gotta say I ordered on Tuesday not here yet --possibly me did things wrong -but gonna investigate on Monday)