I was wondering if its possible for a tailor to create the split back on a pair of trousers. Â I'm guessing yes but not sure if they are cut differently.
It's easy enough to cut a "v" into the back of a straight waistband. That won't affect the rise or the pleats or anything else, just the look of the waistband in back. If you want to a true high back, that's harder. If the rise of the trousers is already incredibly high, the tailor can remove the waistband, cut the trousers lower in front, recut the shape in back, and then re-attach the waistband. The likelihood that your trousers already have a high enough rise for this operation to work is pretty low, however. The other alternative is to take the trousers apart, keep the front pieces, discard the back pieces, recut the back out of fresh cloth with the desired shape, and then remake the trousers. That's a drastic operation, and would cost so much that I doubt anyone would think it's worth the money.