I think the PK-7 is an older model....... if you care. There is a newer PK model, it is the PK-25..... it has 25 pedals and is very much like a real organ pedalboard. Although I've never used either. Try going to  
www.zzounds.com     they have some pedalboards from a different brand..... although I don't remember where. Also try  
www.rolandus.com   Roland's official US website..... or just go to  
www.rolandcorp.com      I think that will direct you to their main site.
------------------
John 3:16  For God so loved the world, that He gave His only Son, that whoever believes in Him should not perish, but have everlasting life.