The site mentions 2.8 amps max, which I would not expect any difference for a pump dia of only 36mm.
You most likely can get away with just a full wave bridge with no other device, cap etc needed.

IF the motor only draws 2.8 amps max then a 5 amp supply should be fine.
Like this one from Amazon. Item # B07NR6FPN9
View attachment 232824

Would an 8 amp supply be suitable if the motor draws slightly over 2.8 amps?

 

The site mentions 2.8 amps max, which I would not expect any difference for a pump dia of only 36mm.
You most likely can get away with just a full wave bridge with no other device, cap etc needed.

Thanks.

 

Would an 8 amp supply be suitable if the motor draws slightly over 2.8 amps?

Sure

 

Sure

Okay, thanks again for all your help, much appreciated.