I need bank guarantee (15,000K.D) to bid in construction project in Kuwait

I have been invited to participate to bid in a construction project here in Kuwait. The owner of the project is one of the well - reputed banks in Kuwait. it's a great opportunity. I'm a registered supplier in the Bank. The condition of tender is to provide a bank guarantee of 5% on the total value of the quoted price. I just need a bank guarantee for 15,000 K.D. maybe it's going to be less than 15,000. When the project is awarded, the bank guarantee will be released back to you, + I will pay yo