Walk Behind Lawn Mowers

Why is the parts list for the 7021p walk behind mower model # "96133000705" not listed on the Husqvarna website?

I bought a Husqvarna 7021p on 04/2012. I ran over a pipe and it sheared the pins on the blade adapter. I looked for a replacement part # on the Husqvarna website, however the exact model# is not listed. The two versions of the 7021p mower listed are model# "96133000700" and "96133000701". The model# on my 7021P mower is "96133000705". From the pictures I've seen, it doesn't look like the blade adapters are compatible.

How do I get a replacement blade adapter for my model #?

Wow, I am floored. Last summer (2015) I bought a walk behind Husquvarna HU725AWDE mower. It was the most expensive one with all the bells and whistles. The battery died after 3 months and Ive been pull starting it since then, but I do like the electric start function. I am an engineer and have designed systems all over the world. I cant believe how difficult it is to find a replacement battery. There are no schematics that even show the battery or provides any part numbers. No parts store, ebay, amazon or any other site even references a replacement battery. Even the model number with the e on it cant be found. This should not be this difficult. The battery is made by a company called LEOCH and shows a part number of 4311584, a 12v3.0AH battery. Neither the manufacturer or Husqvarna show any reference to this part number or any image related to this battery. I'm ready to throw the mower off the cliff. It runs rough and changing cutting height is a pain in the butt. All four wheels have to be individually changed, compared to my old John Deere which was one quick lever. I'm very displeased at this point. Please find me the exact part number of the battery I need and where I can buy it. If no answer, Ill pull my wife into this request as she is a lawyer and will proceed down another channel which you don't want, believe me.