I do not know of a kit that is available.
I have the timer at the link below and it has been great and I personally think that it was worth the price. I think I got it on sale back when I bought it, for about $110.00.....but if I didn't have it now, I would pay the current price as there really is a benefit to training with it.
http://www.midwayusa.com/viewproduct...tnumber=772064