Buy an Armani suit with Armour from the Army............. or alternatively; by a suit of Armour by Armani................surplus Army maybe............. ...or even join the Army................... They will soon knock you into shape so any suit fits better.
I was going to mention tissue paper on Ducbirds rolling suggestion but thought it would be taken as a bit girly. It really does work.
aero stitch is the answer, I don't own one but know a lad who does, seriously he can get it off and back on again in about 20 seconds, he rides with shorts and and a t shirt and when we stop he is sat in his shorts quicker than we can get our jackets off. They do some lighter weight gear that is much cheaper, the big cost is the duty from the states, if you knew someone out there who would get it and post it to you you could save a few hundred quid. Check out Aerostitch.com for more info, as I said I don't own one but will have one one day.
Yeah they have by far the best reviews and been selling themears but, for some reason, no UK distributer?! One for @Exige as our resident entrepreneur