If on the cheap hunt around you can get gaiters that are split along the length and glue together once on the drive shaft.

but i would just take the drive shafts out.

undo drive shaft nuts, lift up car take wheel off, pop the ball joint, get the strut out the way and pull the shafts out easy.

But if taking it to a garage to get gaiters done if milage is high have think about getting bearings done at the same time since the struts are just about out anyway it doesen't take much more time to get bearings pressed out and replaced.