You can find it in your local stores if they have any. If you want it so bad then buy it on Amazon that’s exactly what I did. No one can tell you how long it’s gonna be out of stock on Roku website. It’s been out of stock for at least 90 days now
Until a yesterday you could have gotten the Roku Streaming Stick 4k+ for $49.99 at Amazon & Walmart, which do come with Voice pro remotes. Its back to its regular price of $69.99. Buy the 3821 4K+, keep the remote, sell off the rest to recoup your price.
The Roku stick 4k+ 3821 is back on sale for $49.00 at Walmart: