Here is a New Old Stock Halfords Distributor Cap (for Lucas Distributor) for

Opel

Kadett E 1.6 1988-89

Vectra 1.6 1988-89

Vauxhall

Astra Mk2 1.6 1988-89

Astra Mk2 1.6 Van 1988-89

Belmont 1.6 1988-89

Cavalier Mk3 1.6 1988-89 models.