Which tonearm with a Soundsmith The Voice?

I spotted a review of the Aida, another Cartridge from Soundsmith, with the same specs. It was very positive. The tonearm was the SAEC 407/23. Is this tonearm in production?

The SAEC 407/23 was made in 1980 and you can find details on it here for reference near the middle of the page. Used samples can usually be found on ebay.

Additional links and images of the SAEC arm can be seen by clicking here.

I am curious about but couldn't find the tonearm effective mass for the SAEC 407/23. If anybody could tell I guess it would be a good piece of information, if only to know what works with the "The Voice" in that regard. On the other hand, I guess it doesn't sound that attractive to buy such an old tonearm. Are there tonearms in current production that work?

I received strong advice towards a Schroeder Model 2 with Pertinax arm wand, but at 4000 us $, isn't this a "little" to costly an investment, is this necessary? I would like to think that you don't need to spend that much to get maximum performance from the "The Voice"