Ethernet repeater

I'm with the IT division of a small city government. We recently had a vendor come out to one of our sites (an auditorium) to run two particularly long Cat5e cables to the ticket booth for the credit card reader. However, it seems that the run is apparently too long. (They estimated 90m, but it ended up being pretty much right at 99.5m) The workstation that now utilizes one of these two lines operates fine. Same with the printer. The card reader, however, apparently doesn't put enough juice into its transmissions to make the whole run back to the switch.

We confirmed, after pointless and extensive testing, that the issue is with the physical length of the run. No logical networking issues exist (routing, etc.) The placement of a simple unmanaged switch at the end of the run, between the card reader and wall jack, solves the issue.

I'm looking for the cheapest possible solution to get this card reader on the network, other than the unmanaged switch.

Thanks~

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EDIT: Solved! Compatible solutions were offered:

https://www.reddit.com/r/networking/comments/d3b1s9/ethernet_repeater/f012njm/

https://www.reddit.com/r/networking/comments/d3b1s9/ethernet_repeater/f0177iw/

https://www.reddit.com/r/networking/comments/d3b1s9/ethernet_repeater/f01302n/

https://www.reddit.com/r/networking/comments/d3b1s9/ethernet_repeater/f0173ze/

We ended up going with the speed reduction while clearly labeling the wall jack as "for pinpad only". We didn't want to get a technician confused and attempt to "correct" the cabling upon noticing that the standard of "computer daisy-chained off of phone" wasn't being followed.