WTB - Auto top off, or sump with ATO

[Whatigot]

Hoping someone here has an extra ato or a sump that has one installed already to sell.
I have several smaller tanks (36 gallons and under) with stands as well as lots of extra LR and mushrooms and a couple extra sumps (25 gallon tall wet/dry and aquafuge MP and custom 44 gallon acrylic one) to trade if you'd prefer that over cash.

happy to just give the green if need be, so sick of manually topping off 2 gallons a day and I am worried about salinity when things really heat up.
Please let me know if any of you aquarists can help me out.

Thanks for looking.
Ken.