Another option which includes pre-cut holes for eyepieces & filters it from Andrews Communications for $39. This is what I use ... similar to those sold by Bintel (31 x 26 x 13cm).
Eyepiece case, aluminium, medium-sized briefcase style (holds 9+ e/p)
http://www.andrewscom.com.au/site-section-10.htm
Cheers.