I read on one site that using eggplant as a tomato rootstock works as well or better than the expensive tomato rootstocks.
I have friends in Texas right now and I planned to buy tomato rootstock seeds online for them to bring back here, when I ran across a thread that suggested using Celebration tomatoes, other hybrid tomatoes or the eggplants.
I have Celebration, and the Big Boy and Beef types and of course eggplant seed so I think I will save my money and try those.
The sites I found for tomato rootstock and clips that were the cheapest:
https://www.paramountseeds.com/seed-...ck-tomato.aspx
Clips: small at the bottom
http://hydro-gardens.com/growsup1.htm#plantclips