suction cups ( threaded stem)

RFQ Details

im looking for suction cups with a 2 inch diameter base ( or close to that ) that is threaded on the stem like a light bulb base . the suction cup and stem are all one peice and the same plastic material . the stem should be roughly 3/8 inches in diameter and 3/8 to 5/8 inches tall. these dimensions are approximate as we can work with existing product that is close to theses sizes . are need may be up to or exceeding 50,000 units per year but need to find an existing cup . i have seen these but dont know who manufactures it or supplies them ? they may be an offshore product ? i need to find theae asap as the product is ready to go to market and this is the last component needed. thanks !