a metal coathanger will do the trick, just tape up the end so it doesn't punch a hole in the tubing anywhere. why not try at the bootoms of the drains first, perhaps thats where the blockage is

AFAIK they drain into the front/rear arches

Edit: Also check where the drain tubes pass thru the front wings just in front of the front doors, on a MK2 they pass thru a small hole, they sometimes get pinched between the wing & bodywork if someone has had the wing off in the past.