The only distributor-stock SRDs I know of are the M/Acom MA44767,
MA44768, MA44769 parts, all SOT-23 and dirt cheap. I think Penstock
carries them. The '68 or '69 should be good for multiplication to 2
GHz. For high ratios, an SRD will beat a plain diode by a huge amount.
There are lots of appnotes around about using them as multipliers.

I have a bunch in stock and can send a few to anybody who wants to
play.

I'd like to talk you out of a couple, and thanks for the supplier info.
Wonder what MaCom's min order is? Anything you need in trade or a few green
stamps?

W4ZCB
Call Book Address.