Pump kits come in two flavours. One for regular body cockers and one for mini cockers. The regular has a longer cocking rod and a slidebar/screw that replaces the front block alltogether. The mini option has a shorter cocking rod and a front block replacement vertical adapter of some form or plugs to plug off the LPR port.
WWA makes a nice mini kit. Search pump kits on ebay to see them or google for "white wolf airsmithing". I think he makes a regular pump kit as well.
Chipley Custom Machining also makes nice pump kits in both flavours I think.
I just thought I'd take a quick peek and then the world went all yellow.....