There are a number of fuel pumps that will replace the old Facet, now Facet-Purolator, round style.
The Facet- Purolator pumps which will have some similar performance of the original Facet pump are the;
- FEP-06SV / PRO-06SV,
- FEP-12SV / PRO-12SV,
Gold Flow Series
- FEP-87SV / PRO-87SV.
You can buy many of these at: Facet Fuel Pumps
The Purolator cube models are very, very reliable. My 44 hp Westerbeke uses a PRO-42SV which runs $62.99 at the above link. Mine has over 3000 hours on it. The PRO-12SV (PUR-40106) which works well on M-25's etc. is only $43.99. The Gold Flow series is round like the original Universal/Facet pumps if that really matter to you. It can be found here: Facet Fuel Pumps - Facet Hi-Perf Fuel Pump 1/8 NPT Internal