Need help with parts for my SeaMasters

So, I have a chance to send 2 of my SeaMasters to Europe for hopeful servicing. I am sending along my 1960 14765 with its 550 movement and my 2828 with a 471 movement.
Now this is my issue, i have gone to Ofrei and placed the parts I was told I needed for the 14765 at its initial serving in my ownership, and also the one know issue with the 2828. The parts are as follows:

14765:
crystal
crown with female post
winding shaft (have not sourced it yet)

2828:
crown

here is a shot of what Ofrei has,
14765
Genuine Omega Crown White/Steel 8100/1053 with Separate Female Post 8100/1053W
Genuine Omega Crystal With White Tension Ring OME-CRY-734
2828
Genuine Omega Crown Yellow 069SX42023 8100/1016Y

Now I have looked at the 2828 and noticed the crystal is not original and the rotor appears to be rubbing. Perhaps the cause, not sure but with the distance and the short time, 28 days, that this would have to be done I am hesitant to not send a new Omega crystal also. Ofrei does not appear to have a crystal for the 2828.
So what would the real Omega part numbers of these parts be?
Anyone have then slightly cheaper than Oferi?
Is there a better way to find these part numbers?
Any an all information is greatly appreciated. I am trying to keep the cost down as my wife is not really happy with how much I am spending on servicing these watches.

Again, thanks in advance,

Rob

Watch maker is most likely not Omega certified. Just a local watch maker in my wife's home town that has been there forever, well at least 30 or so years. I am just looking for a cleaning of the 471 as the exchange rate would benefit me greatly. Just thinking of how to avoid any undo wait as my wife will only be there for really 26 days.

SO I have to ask again about this as my time is short and decisions have to be made. Can anyone steer me in the correct direction with these? In addition, I believe I require part 1160 for my 2 piece winding stem. Ebay has one here:http://www.ebay.com/itm/121950904003?_trksid=p2055119.m1438.l2649&ssPageName=STRK:MEBIDX:IT. Would this be correct to a 550 automatic with 2 piece winding stem? Is another piece also required? Perhaps the 1106 part? Please any help is always appreciated. Would like to make my parts buying decision soon and have them before the next 3 weeks.

Again Thanks,

Rob