Early A 17's

We'll crap the wheels I am looking into are available in a 17x8, but they have 5.95 backspace. So.... what about theses guys that are putting the mustang 5 spokes on em? Are they available in 7" cuz I can only find 8s:dontknow::dontknow::dontknow::dontknow::dontknow::dontknow::dontknow::dontknow::dontknow::dontknow: