The following DIN rail IEC terminal blocks and accessories are available:
Weidmuller - Screw clamp terminal blocks                               Each  No
Fuse Block WSI 6  Low Profile  20-8AWG 500V No LED/5-20mm/5x25mm fuse $2.80  85
End Plate  WAP    For WSI 6                                           $0.25  52
These terminals are used - in excellent condition - actual pictures of blocks
For addiltional information see:     
http://www.weidmuller.com/downloads/pdfs/ca_supplement/S106_wsi_fuse_terminal.pdf