Yep for sure, fs.com are also my go-to for pluggables and optics/patch leads etc. Their pushing their full chassis now too, but I've not been game to try.
Their optics are great, but their switches suck.
I bought four S3900-48T6S-R, which were incredibly cheap for 48x1G with 6x10G uplink and dual PSU. But two of them rebooted themselves after a number of weeks in service. Then one got into a state where it was forwarding packets but it was unable to send packets from the CPU - meaning no management access of course, but worse, spanning tree BPDUs were not being sent out.
They released some new firmware and these problems haven't recurred, but it's too late for me to trust them any more. They've now been moved right to the edge of the network for ILO duties only, and will probably end up as scrap.
They no longer sell that exact model, which may be as a result of problems like the above.
As far as I can tell, their switches are rebadged from other vendors, but you can't tell which switch comes from where. For example, the S3900 and S3900-R ranges are from two completely different vendors with different chipsets and firmware (see
here). So you might be lucky and choose a good one, or you might get a lemon model like I did.