I built one of John Ēlark's longrifle kits about thirty years ago, and made up a Reedy rifle that was quite respectable if I do say so. It shot very well, was of very hard maple and was purchased eventually by Hugh Toenjes. Hugh worked his magic on the rifle so the next time I saw it it looked even nicer. I'd be curious, Hugh, as to where it is now. I like to try to keep track of my kids.
But I would have no difficulty with the concept of ordering a kit from the USA. The exchange rate is excellent right now, shipping will cost around $50 - have it sent USPS NOT UPS!!! You pay PST and GST but no customs charges. The Post Office will also charge you $10 as a handling fee, and it'll come straight to your door, if that's where your mail comes, carried gently by a very pretty blonde girl who is very pleasant. I order stuff from the States, just so she'll come for a visit.
Order from who ever you wish, but you can order from the States with confidence.