Better jump on it! I have been watching TC prices for a while and 20-25K is about average with prices around 6500-7000. Several came with the S1L1 installed. Post a pic of the pipe back side and pull the air box cover to see if that is a K&N filter. Answer is No, probably not going to find a kit but YES you can get the S1 flash and you have a couple options for the air box in addition to K&N stock style. The big money is those pipes. Your not going to find the L1's just laying around HOWEVER there are some good alternatives.
As far as 06, the last year, best MONO and you can't kill that V92! Just like ByteN2it said, the TC is tops in the traditional bagger from VIC and I am VERY glad I did NOT sell my 04. I put about 20K on mine in a little over a year and only reason I bought the VV is the deal I got on it. I have done to Saddle Sore 1K's on my TC and rode to work the next day like nothing. It rides that good.
Good luck, post a pic of that exhaust and keep us posted!
2011 White Vision - Nuvi 550, Lowers, Lloydz 2nd filter, Vic perf filter, CB/Icom, 96 Brake LED's, Clear Signal lens/Switchbacks, VIC Hwy Pegs, Stebel Horn, 7Jurock 15" Shield, PCV, Lloyd ATS and Variable intake, Ness honkers
2004 V92 TC - S1 flash, level 1 slip-on, Ness big sucker K&N, ISO Grips, 4x1.5 Highway Hawg Risers, extra chrome (never too much), JM 2k CB 4' antena, Mustang seat, HD Front TS & Lowers, OD Pulley
Retired Navy SCPO