APM - Herschel wedges - http://www.apm-telescopes.net/en/Observe-the-Su.../Herschelwedges.html

Baader Herschel wedge / Solar film - http://www.baader-planetarium.de/
Coronado Ha Scopes - http://www.meade.com/product_pages/coronado/coronado.php
Daystar - http://www.daystarfilters.com/
Lunt Europe - http://www.lunt-solarsystems.eu/

Lunt USA - http://www.luntsolarsystems.com/

Solarscope - http://www.solarscope.co.uk/products.html
Solar Spectrum - http://www.solarspectrumfilter.de/

White light solar filters are available from many astronomical vendors.

1000 Oaks - http://thousandoaksoptical.com/
JMB - http://www.identi-view.com/welcome.html
Astrozap - http://astrozap.com/scripts/prodList.asp?idCategory=30
Seymour - http://www.seymoursolar.com/product_info.php?products_id=477