When I went to replace the paddlewheel I learned that Simrad no longer supports this product and therefore the part is no longer available. After much hunting I found I could get them through scubastore.com I bought 4. Don’t know how many of you have these instruments but if you do wouldn’t be a bad idea to buy some for inventory. I think they will only get more difficult to find.
My part number was 202-00-129
Hope this helps.