IMOOI do some great cufflink designs, not least these rather smart target-style cufflinks.
They’re made from a combination of stainless steel and rubber are available in the three colour schemes pictured. The use of rubber is practical – offering protection if you happen to drop a cufflink. The stainless steel means it isn’t likely to tarnish like silver.
You can buy them online, priced around $65 (around £35) per pair.