My stockpile of sites with multi-gang switch plate covers (we have an entry way with a 5'er (yes, 5), so I spent time tracking down some options!

http://artplates.com/index.html

http://www.kyledesigns.com/c=Gte8c6D55USEz3ocXVZJg8xo2/product/SPNV

http://www.wallplatewarehouse.com/

i didn't go on a search for colors, but did need to find a 4-gang that had a standard switch in the first position. be aware that if you use a timer, it may not fit in some of these plate covers. i ordered one from kyle designs and my standard leviton timer did not fit through their decora sized hole. they were unwilling to work with me and just kept saying that all of their products are created based on caliper measurements and would not accept my tape-measure measurements (as if all of us have calipers lying around) and said that my timer must be oversized, which leviton says is standard decora size.

home depot has some modular plate covers (leviton as well i believe) where you can choose the shapes of the switches you need and click the pieces together. these also did not work with a timer because of the overlap where the modular pieces click together... but it may be an option for you if you only have switches. not sure what colors they have available since i needed white...

Here is a link that might be useful: the modular pieces at an online store - i have seen them in home depot too

you may get the Bathroom Master (heat/fan/light combo), which can instantly warm up when you take a shower without pre-heating requirement, the switch is included, from the following distributors:
http://www.rewci.com/baexhefaninh1.html
http://www.aupu.us/PRODUCTS/BathMastr/BthMstr.htm
http://www.bainsneptune.com/english/ventilateurs/v-csbm.html

Based on my experience with the links that John604 referenced, I wouldn't buy from any of them.