How to get Identity Column to jump ahead (by say 1000) on SQL Server 2012
You could do this by running something like

declare @newid int;

select @newid = IDENT_CURRENT('YourTable') + 2000;

dbcc checkident('YourTable', reseed, @newid);


This would reseed your table identity to be 2000 higher than it currently is and seems like it should resolve what you are looking to do.