I will try to put something together. Been busy on a DIY kitchen re-model.
Here is a list of the items used to build the system. All bought on Amazon. A copy and paste into the search box on Amazon should pull the items up.
SaiTech IT 4 Pack 15cm Short USB 3.0 Male A to Female A Extension Cable $11.99
Extension cables used to add clearance so 2 USB dongles can be used on the Raspberry Pi (has tight spacing on the four USB ports)
Wathai 2PCS 50mm x 10mm 5V Mini Box USB Computer Fan with 3 Speed Control $10.99 (pair) (Nice quite oversize fan to keep things cool)
[5V 3A 15W] iUniker Raspberry Pi 3 Case, Power Supply With Switch for Pi 3 B+ $13.99 (nice case but comes with a tiny fan with a high pitch whine that did not cool enough when running the Pi hard)
YWBL-WH External USB Audio Card Driver USB Sound Card External Audio CM108 $7.92 (nice USB sound card with excellent audio playback and a mic input)
The heat sinks used came as part of the case above.
The audio is really good on this system, I also complied and run NRSC5 to play digital broadcast FM on this system.
Hope this helps