Or you may be able to find the predecessor of current Garmin European mapping, which was called
Roads and Recreation v4.0, very cheaply on eBay - I paid £15 for it, and it looks as though it will work in much the way Tracklogs does for me in England. Soon to be tested in Belgium - and I'll be taking a paper map just in case
Update: it worked really well. Two days' excellent cycling on quiet lanes with hardly a wrong turn, despite the complexity of the planned route. The Garmin mapping, when putting in trackpoints (or whatever they actually are), seems to "snap" to junctions; I was concerned that it might not signal turns until too late, but the GPS actually beeped and indicated just
before turns (I navigate via the compass arrow screen).
Two caveats: the Garmin mapping, compared with OS mapping, is very hard on the eyes when creating routes, and while it distinguishes between major and lesser roads, it does not distinguish between
types of lesser road. Relatively busy B-type roads and the most obscure unsurfaced farm tracks are depicted by the same plain lines. On the ground, we occasionally found ourselves faced with roughstuff, and chose to go round it (the GPS coped with this without fuss - the lanes network in Flanders is so dense that you soon get back on route, most likely without needing to use a major road). For both these reasons, it would, I think, be best to plan a route in a road atlas and only then create it in Mapsource.