http://www.globalwatchband.com

http://www.strapcode.com

http://store.debaufre.com/

http://www.bjstrap.com/info.html

http://www.panatime.com/

http://Stonecreekstraps.com

http://www.watch-band-center.com/

http://strapculture.com/

http://www.thewatchprince.com/

http://www.toshi-straps.co.uk/

http://bradystraps.com

http://www.thewatchprince.com/

http://www.crownandbuckle.com

Ted Su (Taiwan) , makes one the best straps anywhere, worth checking.
http://www.tedsustraps.com/

So is Steve O (England)
http://www.steveostraps.com/

Here is the Master.... Joe D .
http://snprstrap.com/
http://www.facebook.com/SNPRStraps

http://www.strapevolution.com/Strap_Evolution/Home.html

David Appleman was nothing if not professional and patient when dealing with me.

Martu Straps. She will make you a nice custom strap for $35.

http://www.martuleather.com/

Also on ebay
http://stores.ebay.com/MartuStraps

I love the stonecreek straps.

http://diaboliqstraps.jimdo.com/

He is popular on other watch forums and, from what I've seen, he is reasonable. A little cheaper than a lot of strap makers.

Diaboliq Straps is on Facebook too.