Help appreciated here in UK (it ain't half grim)

I've a RHD 1998 Blazer for 10 years, perfect in all ways til now.

1. The headlamp washer is leaking. I understand there is the washer fluid tank (same as for the windscreen) and pipes to the headlamp washers each themselves connected by a long washer fluid 'tube' (called a 'headlamp washer unit') that sits behind the front bumper - I need to get a new 'headlamp washer unit' but cannot find one anywhere. Can anyone kindly help?

2. It is also leaking coolant as the head gasket/intake manifold has gone and needs replacing (not a difficult job but a long one) - where can I get an original factory head gasket? Happy to get a US import.

 

For the lower intake manifold gaskets, FelPro has a kit with an upgraded gasket with a metal frame for the seals. Part No: MS 98002 T. It includes the seals for the intake plenum too. If you can find it, these are the gasket to get. Does Rockauto.com ship to the UK?

As for the headlamp washer parts, is the problem with the pump? If so, you may have to adapt an aftermarket one.