I paid exactly $950 in an ebay auction. Shipping was another $150
if i were you I would tell him that you are in Singaporre and see if he can sell to you for $950 including shipping.
Maybe combine that offer with the sideskirts since its going to be expensive for you either way.
I think they might be inclined to work with you since they selling allot of these bumpers. Ask about prepainting maybe its cheaper than in Singapore. Since they are factory parts they should just bolt right on no need to sand before priming/painting.
The other thing I would do is to join Rennlist($20) and say that you are a Rennlist member. DPS are not Rennlist sponsors so they may give you some goodwill since they make lots of sales because of Rennlist without actually being sponsors.
I know they have done many group buys on that site and asked the 911 guys to put the word out to Rennlist Boxster owners since the front bumper works for both.
Just be patient with those their customer service department is not the best I've dealt with which is fine by me as long as the prices are good.