No affiliation, but I've had positive experiences with these sellers in the past.
I believe this will only fit ATX motherboards because it has two internal 2x 2.5" drive mounts, but for the price, it seems reasonable. They offer rails for an additional $30.
I bought two at $165 w/ rails & the riser cards plus shipping
SuperMicro Server CHASSIS 10 Bay 2.5" SATA/SAS/SSD CSE-116 1U SAS-116TQ Trays X9 | eBay
I believe this will only fit ATX motherboards because it has two internal 2x 2.5" drive mounts, but for the price, it seems reasonable. They offer rails for an additional $30.
I bought two at $165 w/ rails & the riser cards plus shipping
SuperMicro Server CHASSIS 10 Bay 2.5" SATA/SAS/SSD CSE-116 1U SAS-116TQ Trays X9 | eBay