Well, it's FUBAR. 
It's 98 Rover 216SLi with what I hope is HGF, and not a cracked block.
How much should I be looking to pay for a Head Gasket set, and where would be best to look for this and other parts?
I'm sure I read something about a Klinger headgasket or something? Is this a good idea?

It's 98 Rover 216SLi with what I hope is HGF, and not a cracked block.
How much should I be looking to pay for a Head Gasket set, and where would be best to look for this and other parts?
I'm sure I read something about a Klinger headgasket or something? Is this a good idea?

). The genuine kit is a bit more expensive, but probably worthwhile if you intend to keep the car. Check ebay, dozens of aftermarket gasket sets on there, but occaisionaly you see a genuine set go cheap.