I posted a message last week inquiring about RF fuses. Thank you all for your help. I found quite a few, most very expensive, around $100. But this place in the UK http://www.ssejim.co.uk/4-rfmiscproducts.htm has BNC fuses and fuse holders made by Marconi for 6 British pounds.. With shipping it came to another 6 pounds for a total of 12 pounds each, about $18.00 US.. I though that was reasonable for the protection it offers so I ordered two of them, one for my Cushman CE-15 Spectrum Monitor, the other one for my Wavetek 2000 Service Monitor.
Dave WB2FTX