FMS has multiple coils that may fit your motors. To determine which ones that will work in your application, you should fill out the service request - Car Audio Classifieds
If that motor isn't in his database, then you will have to provide accurate measurements of it.
Length isn't a problem because of former extensions that can be added to the coil. I have a friend running a 4" motor/Ti basket combination and it works great. I've used his 3" extensions on some LMS coils/eD AV13 baskets.
Spiders and spacers are the easy part.