Amazon has some sensor bulbs for sale:
5W Radar Sensor Bulbs
URL? https://www.amazon.com/Motion-Sen…B01MQ1HSO
Price?$6.79 after Code?CK4KR2WQ
7W Radar Sensor Bulbs
https://www.amazon.com/Motion-Sen…B07CZ8JV1
Price?$7.47 after Code?CK4KR2WQ
9W Radar Sensor Bulbs
https://www.amazon.com/Motion-Sen…B078H5JB1
Price?$8.15 after Code?CK4KR2WQ