Have you tried this company?
Eric Min/MINYOUNG Auto Co.,Ltd. in Korea e-mail : firstname.lastname@example.org phone : 82 31(NNN) NNN-NNNNfax : 82 31(NNN) NNN-NNNNskype : eric.min4
I am still not sure which engine you have but here is another contact:
Really appreciated your last email where you indicated that the Ssangyong Actyon was a China made engine. This information has directed me to search for the injectors to China and I have fantastic responses from them.
I actually directed my request to gasgoo.com and they in turn send my enquiries to their network of suppliers who response within 24 hours. I am waiting to receive them in the next couple of days. The prices are very reasonable too.
Thank you again for the key word "China made" which is fantastic.
I would give you 7 stars for this service.
Henry CH King