He means the spring in the mag, not the slide spring. Plus he wants a stronger follower, which the TM one won't work since its a different design. -1 reading skill
Try taking an intact one to a metal shop and see if they can custom fab them for you. Then sell them to other people that are tired of their follower flying at 9000 miles an hour out of their mag never to see again.
Or, if your skilled with CAD/ knows someone that is, make a copy in CAD, then look for a company to fab it in china on
http://www.alibaba.com/ . Get lots and sell to peoples!