Radiator woes

[PH47]

Well.. the daily driver ('90 KE laser hatch) blew its radiator. Had only just started it off and was 1 minute down the road when steam etc coming from under bonnet.

2 cracks.. one on the top spewing coolant, the other somewhere in the fins spraying a little bit of coolant.

My mate andrew (2ndOwner) had a spare from his laser but when we went to take out this busted one noticed it's diff..

Mine seems to be plastic ends, and has 2 extra small hoses down the bottom.. is this for aircon or what? Was scared to disconnect them since I don't know what's running through it :P One guy told me it's for the aircon, another said it's to cool the oil.

Would this radiator be fixable or do I need to replace it?

How much is a radiator, and does anyone have one lying around?

Cheers.