Need advice on replacing circ pump

[slash007]

The circ pump on my boiler gave out and when looking for a replacement, I noticed so many different options and wasn't sure which one I needed. It is on my boiler that supplies hot water to my 5+2 wash. I'm guessing I need a closed loop circ pump based on the setup, but am not sure and have no idea what else I need to be looking for. Here is a pic of what I have. Thanks.

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[getnbusy]

Cant offer an option but I will say I am a fan of OEM replacement parts. I used to try and source every single part to everything but I got tired of trying to make something work or having to return something. NOw I get the oem part and its sposed to fit. Swap it out and on to the next project. Sometimes it is worth trying to save a few bucks tho. good luck