You can look at the end of the axle and see if it says ME for Moser or Strange or another brand, but the only way to tell what spline is to pull one out and count them. The c-clip elim has to fit the diameter axle used, there are quite a few different options.
Unless its a drag only car the spool isnt the most street friendly set-up. If you need parts, let me know I give all SN members a discount.