PoE powered switches with passthrough

I'm in the process of assembling a list of PoE powered gigabit managed switches that have one or two ports of downstream passthrough.

The search has been easy so far for 5 port switches.

• D-Link DGS-1100-05PD is a 5 port switch powered by 802.3af or at (if extra power budget is desired) and supports two downstream PoE devices with an 8 or 18w budget depending on input.
• Netgear GS105PE is identical to the D-Link in every way. It's stated to support 19w of downstream PoE when powered by an 802.11at POE+ device.
• Trendnet TPE-P521ES is identical to the other two, but with an 18w budget

Easy peasy right? I've been having issues finding options for 8 port versions. The only one I've found so far that supports passthrough is the Ubiquiti Unifi US-8, and if I drop the passthrough requirement I've only found the DGS-1100-08PD and the GS108TV2 to support PoE power.

Just wanted to see if anyone has gone through a similar search. Cheers!