Don’t think he’d be able to get one big enough to cover the join and anyway it would get wet when it rained
Puzzled, he refuses to put up a picture but every solution proposed is rejected because of size or difficulty so either it can be seen from the road or has had access to the roof as he has complained about the ridge tiles. either way not difficult to get a picture
I think this is one of those occasions when the OP will be very hard to help. A tiny bit reminiscent of some of the attempts to assist Kools!