They do make them and label them as X-Tended Fit.
I purchased some and I like them. They won't take out all the movement in your tt, but they do help.
Here's a link I posted after purchasing mine; X-Chocks For Prime Time's Wide Axles
Gary & Trish "PT Crew Member Since 11/2010"
2017 Prime Time Crusader 315RST TE 6.0 : 2007 Flagstaff 206ST MAC Series
2012 F-250 Lariat : FX4 : CC : SB : 6.7L Diesel : 3/55 Gears 2016 Nights Camped - 9