I got really lucky on ebay and got a new elster amco meter v-100 3/4" for $15 including shipping. It cost me an additional $18 for the couplings that I sourced at the local plumbing supply house - I tried to get the couplings online - but couldn't really find any thing that much cheaper based on not knowing actually what would work.
This type of meter is simple pulse and I'm using it for whole house water count.
A quick search on ebay (just now) I found a buy it now for about $46 with shipping.