The wheels are expensive,but there are copys on ebay that are a lot cheaper
http://www.ebay.co.uk/itm/18-FORD-TR...ht_1506wt_1018
http://www.ebay.co.uk/itm/18-FORD-TR...ht_2495wt_1255
Look on there for a sport van breaking and get the electric windows from one of them
As far as lowering goes,you can lower the front easy but the rear its air bags or as said above,i think you might be able to get the springs decambered aswell but im not sure