I am looking for a IR Blaster to use with an Xbox Series X. The IR sensor is on the pairing button next to the USB port and I want to avoid sticking a blaster directly on the button.

Is there a front firing (mouse shaped) blaster available that I can just set directly in front of the Xbox that will work with a MRF-350? Would this Logitech unit work?
[Link: amazon.com]

I understand I would have to convert from a 2.5mm plug to a 3.5mm, but would it be functional? Is there another similar unit available? Thanks.

Yes that will work. But it is very expensive for what it is.
Here is a much cheaper alternative that does the same thing:
[Link: amazon.com]

I was able to pickup the Logitech one for $15 on eBay. Also ordered the one you recommended to have on hand. Thank you.

The MRF-350 has a built in front IR blaster