Your search for "billy blastoff" revealed the following:

8-3/4"x 1/2" tracks for Billy Blastoff Sled tractor replacement custom tracks (Pair) x2

8-3/4"x 1/2" tracks for Billy Blastoff Sled tractor replacement custom tracks (Pair) x2

$ 26.00

Eldon Billy Blastoff Tracks they fit the orange Space Cadet Set and can be adapted for other Eldon Vehicles. White Rubber 8-3/4" long.

Eldon Robbie Robot Billy Blastoff : Battery Box Cover Airtank Red

Eldon Robbie Robot Billy Blastoff : Battery Box Cover Airtank Red

$ 22.00

Eldon Replacement Battery Box Cover Robbie Robot 1 and Billy Blastoff. Red plastic material reproduction.

9" x 1/2" Rubber tracks, Vintage Toy Replacement White Tracks 9 x 1/2" Set of two.

9" x 1/2" Rubber tracks, Vintage Toy Replacement White Tracks 9 x 1/2" Set of two.

$ 26.00

Pair of White Eldon Billy Blastoff Replacement Rubber Tracks. 9" Approx. Used on Space Scout Vehicles . custom fitting for other projects please contact us. Thank you.  White Rubber

8-3/4"x 1/2" track Make your own. Single length

8-3/4"x 1/2" track Make your own. Single length

$ 14.00

Single lengths Make your own,  White Rubber 8-3/4" long.  This rubber track is thin enough that it can be easily trimmed to smaller widths and lengths.