I am just (well, 1500 miles!) north of you in Canada and know how hard it can be to find Freelander parts over here.
I get some small parts from Atlantic British but they don't seem to be into parts for major engine work, just fast moving parts.
I have had good luck with parts from Rimmer Brothers in the UK. They are very good at mail order to North America and have an excellent website that
shows blown parts diagrams. If you do check their site for KV6 parts you will also want to check the MG ZT section as they also used the same engine.
e-bay.uk can also be a good source for some parts.