What country are you in? In the UK PC Specialist are excellent with both prebuilts and custom builds if you want to select your own parts.
I bought an Alphasync prebuilt in December 2020 from eBuyer that I have been very happy with. I initially ordered a custom build from PC Specialist in November 2020 when the Ryzen 5 CPU’s launched, but their delays were huge, and by early December they told me I wouldn’t get my build until the end of January.
I cancelled and ordered a 10850k, 3090 build from eBuyer and it came the next day. Costing up the individual parts I basically got it for around the same price it would have cost me to buy everything, and they did a superb job with the cable management.