Need help with Snapper repair parts for walk behind mower

Hi alltogether. First of all: I'm from Germany, thus please excuse my mistakes...
Now my question:
I bought a Snapper Commercial 21500 walk behind mower with a Wisconsin Robin WI 185V engine.
Now it's time for a little inspection and replacement of some wear parts.
Because Snapper is not very popular in Germany these parts are here extremely expensive. For example "00" grease (about 6,60$ in US) is sold for 68Euro (means 89$)!
This is why I'd like to buy my parts in US, despite of high shipping costs and customs. Now I need your help.
I need a shop/onlinestore, which:
- has a wide range of snapper parts or can order them
- ships worldwide and with precalculation of costs
- accepts paypal

Do you have any good idea where to buy (I already used google for hours, but found nothing, that really satisfied me).
Or is here any willing person and/or Snapper dealer around, who would send parts over the ocean? I already looked in the sponsor area, but found nothing that sound right to me...

Hope this is the right area for my request. If not, please switch it to another discussion area.