When you say orange, do you mean orange amps? If so, then you’re probably trying to build a Celestion Fullback G15V-100 right? My advice to you is to use utmost caution, because this is not for beginners. You can ruin a speaker right quickly if you don’t what you’re doing? So, you may want to make your first one from an inexpensive or surplus speaker? A brand new one is twice your budget, but I’m sure you can find a used one for less? They go no lower than $135 new, $75-$100 used here in the states? Good luck :)
Ozz, a friend of mine told me that they’ve replaced the Celestions with Eminence speakers in the Bass amps, so that’s probably what you have, here’s some info on specs, but imho I think it’s way easier buying a used speaker instead of trying to create your own, costly if it’s a wash?