pervasive v11 pivot or self join

[ssmac]

Hi,

I have a table like this

kit|part

1 | 21
1 | 22
1 | 23
1 | 24
2 | 30
2 | 31
....

Number of related parts to kit can be from 1 to 30

Would like to return this in one row like below

Part would ideally be in 1 column separated by a value like comma

Data Type is Integer for both kit and part

1 | 21,22,23,24
2 | 30,31


I have tried self joins and have tried group concat but have not been successful

What is best way to accomplish this ?