Yeh they've got holes. The Monty ones will fit, just won't be able to reach the bolts because the dropouts are about 6" long. Get some big ones like TrialTechs. Also remember, you need a hub designed for them, otherwise they won't fit in the frame. If you have a T-Pro hub you could always get the hub spacers machined down 3mm either side easily enough and they'll fit no trouble. Or you could just grind them down, but they need to be square with the axis really, otherwise they may put uneven pressure on the cone., which could make it wear unevenly and have tight spots as the axle turns round. So if you know someone with a lathe, it'd be ideal, you could just get them to take 3mm off each spacer.