How to get Parts that have two different value source type?

Question

I work on sql server 2017 i need to get part id that have two different source type per same part .

but part have two different source type per part

and it must have one source type from two source type equal 8901 .

sample data

create table #temp
     (
     partid int,
     sourcetypeid int
     )
     insert into #temp(partid,sourcetypeid)
     values
     (1290,5012),
     (1290,5012),
     (1290,8901),
     (3501,5402),
     (3501,74430),
     (7001,8901),
     (7321,8900),
     (2040,5090),
     (2040,5400),
     (7321,7400),
     (9110,8901),
     (9110,8901)

what i try

select partid from #temp
 where sourcetypeid=8901
 group by partid
 having count(distinct sourcetypeid)=2

but it return null

expected result

partid that have two different source type at least source type 8901 must exist