Each Battalion has its own PRI and produce their own stock including
T Shirts,Tracksuits etc ....
1st Bn (Cheshires) are in Catterick 2nd Bn (WFR) are in Belfast 3rd Bn (Staffords) are in Tidworth, the 4th Bn (Volunteer) have their BHQ in Wolverhampton and RHQ is at Lichfield.
4th Bn. has loads of t_shirts,along with polo shirts, fleeced lined jackets and trakkies all the Coys were supplied with them, so speak to the PSAO of the Coy nearest to you . Failing that give HQ coy a call I m sure the PSAO there would help.