( 3 year old post)
A Pair of matched Mitsi 1969`s can still be had, but it is going to cost you, RFParts in San Marcos CA still has them for $31.90 a pair, And they are the only ones I would trust to sell you a true Mitsi Part.
Almost everything else you find on-line now days is some re-branded Chinese fake.
Durham radio up in Canada "might" have some left, don`t know, they are also trustworthy.
There is a replacement called a CB-20 made by Eleflow, as far as I know there only distributor is a gentleman that goes by weazle66 on E-bay and the cost is about $6.50 each.
To make it worthwhile you need to buy a dozen or so to bring down the cost of shipping from ($13.72) the UK, cost`s him the same to ship one or a dozen.
73
Jeff