Newegg.com has Patriot viper 4 32gb kit (2 x 16GB) DDR4 SDRAM 3000 (PC4 24000) for $142.99 plus $ 0.99 shipping.
DDR4 3000 (PC4 24000)
Timing 16-16-16-36
CAS Latency 16
Voltage 1.35V
Seems to be a good kit for the price and its compatible with Ryzen.
More info at: https://www.anandtech.c
https://www.newegg.com/Product/Pr…6820225032