Chappers

I've recently been measured up at my local cycle shop. Turns out I'm a little ad normal shape with a longer torso and shorter legs. Looks like I need a longer top tube than standard.

My recommended bike frame: http://farm3.static.flickr.com/2470/3658014390_776...

Problem is I can't find any popular bike brands that make a frame in this size. I've looked at Scott, Giant, Cannondale, Trek ect.

Should I get a custom built frame at a bit more expense or get a cheaper standard size frame and put up with the discomfort? I'm thinking custom, is a proper fit that crucial?

I cycle to work every day yet after cycling on monday my legs ache, and as I go through the week its gets progressively worse making friday a real struggle. It has improved slightly the more I bike as my muscles get used to cycling but is there any other ways I can speed up my recovery time and reduce aches, should I warm down? how? any ideas thanks.