Looking for wheels

I'm sure this has been answered in another thread but I just can't find the info I'm looking for. I'll make it quick and hopefully not confuse anyone. I've got a '71 swinger. I have a 8.25 rear with 4.5 bc but I have the factory disc brakes on the front that have the 4" bc. Here's what I'm trying to do, I want a bigger tire under the rear, I'm game for the mini tub and the spring relocation but from what I've read (I know I'll have to measure my own) it looks like the general rule most people are running is a 15x10 wheel with 7.5 back space, the only wheel I've found that has that is the weld wheel, but they don't seem to offer a wheel with the 4" pattern on the front. I want my wheels to match and don't really want to use adapters on the front because that'll probably push the fronts out too far. I looked at coys wheels and they offer the 4" bc but no wheel that's 10" wide with enough backspace. I'm not opposed to narrowing the rear but it looks like the axles may be hard to find. And with buying wheels, tires, tubbing it's gonna start adding up the $$$ if I try to narrow. Believe me I know you gotta pay to play but I gotta watch what I spend. Anyway, does anybody have any other wheel choices or ideas that I haven't came up with. I'm also not opposed to going with 17 or 18 wheels but still wanna get as much under the rear as I can. Please share any photos or ideas you have. Thanks for any and all help and a big Thanks for this forum and its members. I also prefer chrome over polished. Thanks.