I am a fully licensed supplier.TRANSPORTER THE RESCUE -SOUND SET (5 chips)SKU: SND-TRANSC$60.00PriceQuantityAdd to CartBALLY ROMSSET OF 5 (U4.L2/U19.L2/U20.L2/U21.L2/U22.L2) TECH SPECSBally: Transporter ROM Revisions Game Version L-3 U26 : Checksum: 8242 U27 : Checksum: EBE5 Sound Version L-2 U4 : Checksum: 62B0 Speech Version L-2 U19 : Checksum: C7AF U20 : Checksum: C8AE U21 : Checksum: 8354 U22 : Checksum: D54C PROGRAMMING NOTE: Check the filesize of the ROM image to confirm what size EPROM to use: Size EPROM (size) ------- ------------- 131,072 27C010 (128K) 65,536 27512 ( 64K) 32,768 27256 ( 32K) 16,384 27128 ( 16K) 8,192 2764 ( 8K) 4,096 2732 ( 4K) ROM REMOVAL & INSTALLATION INSTRUCTIONS https://www.pinballrom.com/_files/ugd/0a3635_1f0af8ba09644eb78d30e50f112cf374.pdfWILLIAMS SOFTWARE LICENSE https://www.pinballrom.com/_files/ugd/0a3635_523e61bbc4f04fb5985c60266a76c1e2.pdf