You will find that Dayton relays fit well in standard panels without needing extra modifications or hassle.
DAYTON Gen Purpose Relay,8 Pin,Octal,12VAC, 5X825
The relay feels solid in hand, and what stands out about it is how smoothly the armature moves without any sticking or chatter.
With the Schneider Electric brand, the relay feels dependable, and it fits nicely into existing control panels.