If you walk in to any RAuxAF HQ and ask nicely they will arrange a real 1250 (F Mod90) for you although it will say RAF Reserves on it. Not only that but they will give you a uniform and encourage you to wear it at weekends when you visit them. You can also spend your holidays from work wearing the uniform when you visit RAF stations. Of course they might call you up and send to to somewhere nasty, but hey, you've done all that before so no problem. You get paid as well. Can't be bad.