Recipe: Candy Corn Cookies (using sugar cookie mix) - Orange Paste Food Coloring?

Does anyone know where I can buy Orange Paste Food Coloring for this recipe? Is there something else that would work, maybe a gel?

CANDY CORN COOKIES

1 pouch (1 lb 1.5 oz) Betty Crocker sugar cookie mix
1/3 cup butter or margarine, melted
1 egg
Orange paste food color
2 oz semisweet chocolate, melted, cooled

Line 8x4-inch loaf pan with waxed paper, extending paper over sides of pan. In medium bowl, stir cookie mix, butter and egg until soft dough forms.

On work surface, place 3/4 cup dough. Knead desired amount of food color into dough until color is uniform. Press dough evenly in bottom of pan.

Divide remaining dough in half. Gently press one half of remaining dough into pan on top of orange dough. On work surface, knead chocolate into remaining dough until color is uniform. Press over plain dough in pan, pressing gently to edge of pan. Refrigerate 1 1/2 to 2 hours or until firm.

Heat oven to 375 degrees F. Remove dough from pan. Cut crosswise into 1/4-inch-thick slices. Cut each slice into 5 wedges. On ungreased cookie sheet, place wedges 1 inch apart.

Bake 7 to 9 minutes or until cookies are set and edges are very light golden brown. Cool 1 minute; remove from cookie sheet. Cool completely. Store in tightly covered container.

High Altitude (3500-6500 ft): No change.

Do-Ahead
Cookie dough can be frozen in an airtight container for up to 9 months. Thaw just until soft enough to cut.

Storage Tip
To keep cookies longer, wrap tightly, label and freeze up to 6 months.

Makes about 9 1/2 dozen cookies
Source: Betty Crocker