well arent you the fool then, lol.

could you perhaps put some tape on to at least slow down the leak so the rad weld can try and have some effect?

then when it stops leaking you can peel back the tape a bit till it starts leakin again and put more rad weld and repeat this process till it is patched up. will only be temporary until you can source a new radiator ASAP!

just an idea mate, it may not even work.