There may or may not be something currently available for your pedal setup. It depends what pedals you use. If it is just a GT-8 you use, there will be a number of things on websites such as
www.thomann.de
Personally, i would get a thin bit of wood, attach your pedals down to it with something which wont allow them to realistly become un-attached, put it inside some other flight case and attach it strongly. If it is only a tempory setup (i.e there just to save setting up time at practices and gigs), electrical tape will do the trick, if it is pernament, use metal clips of some kind and some cable ties.
If you plan to carry it around to practices, the weight of a case may be a factor but it is also more likely to get bashed. Personally, I don't trust soft cases any more.
Solid case with foam on the inside is my preferance for just about all musical equipment.