You have two fairly simple options here, either the United status match or a Turkish Airlines status match. That gives you 3 or 4 months of Star Alliance status, respectively.
United Airlines has launched a new MileagePlus Premier Status Match Challenge for 2022, offering 120 days of complimentary Star Alliance status and a
www.australianfrequentflyer.com.au
Did you know that Turkish Airlines offers a shortcut to Star Alliance Gold status?
www.australianfrequentflyer.com.au
Are any of your upcoming flights on United or Turkish? If so, you might be able to extend the status for another year.
My personal pick would be Turkish Airlines as you only need 1 TK flight to extend the status to a year. It's also a better program IMHO (much easy to requalify for Star Alliance Gold than United). And your QF Platinum will match to TK's Gold equivalent tier - with United you'd match to Platinum which makes it harder to retain.