Sacrificial bridle loop pictorial.
Create a 2 to 2.5" loop using single overhand knot. Trim and flame end.
Put bridle leg loop, the one at the end of the bridle, through endcap.
Attach sacrificial loop to bridle loop. (square knot )
Tighten and pull square knot through endcap.
Loop sacrificial around endcap as you would normally the bridle loop.
Tuck that ugly knot into the hole if you don't like the way it looks.
It's gonna be a little tight in there, but that's ok because it will reduce movement and, therefore, wear. I have not done this on any of my kites, but going by Paul's description, this should work fine. I wouldn't bother extending the center frame loop. Just replace that shorty as necessary. This will put your bridle about 1-1/2" further out from the sail. If you don't like the feel or performance you can tie a knot(s) in the bridle loop to shorten it to the original lengths, or just shorten the bottom ones to improve axels. You knew about shortening the bottom of the bridle to make axels easier, didn't you?
P.S. -- You guys owe me 9" of bridle line that I wasted on this picture shoot and a million dollars for the pics 'cause they're priceless, or 6000 words because that's what six pictures are worth.