By August if Corona virus is still disrupting China manufacturing, GPUs will be impossible to find as profitability soars for GPU mining[/li][/list]
I highly doubt that by August the CoronaVirus will be an issue, if it still will be an issue by then, then the entire planet is pretty much doomed since many goods are produced there and mining ETH will be the least of your concerns.
Either way, there are tons of GPUs out there. Basically mining got very unprofitable at the end of 2018, so basically every GPU produced in 2019 and most of 2020 most likely wasn't bought for mining. So if profitability increases, people can just buy those GPUs second hand. There won't be any supply issues. Think of how many RX 570 are sitting collecting dust right now in basements.