You will find that the enclosed relay fits well in crowded boxes and leaves room for other parts.
QTY (1) Wieland Bamberg 87.220.2253.3 RAB-FSS 16 Relay Module Relaisbaustein NNB
What stands out about the fit is that this relay replaces 118168-01 without extra brackets.
If you want something simple, the Honeywell RA8366 does the job without fuss.