Capps and Dunlop do a great selection. The Dunlop work boots are exceptionally light and comfortable (if they are suitable for your purposes). Were you after safety boots or non safety ones?
http://www.tufftools.com/footwear
Makita do some great sanders and have had rather positive reviews from previous customers - not sure if you may have already looked into them. We also offer a great range of alternate sanders here at TuffTools: http://www.tufftools.com/search.asp?search=sander