LM317: alternative P2P GPN recommendation

Hi team, 

My customer want to find the alternative GPN which can P2P replace the LM317KTTR as their second choice.

1. Vin = 20V, Vout =15V , Iout= 800mA.

2. Price should be as low as possible.

Could you please recommend some GPN ?

Best Regards,

Wesley Huang                                                                                                     

Email: wesley-huang@ti.com