You could try messaging arcebus and maybe buy the swim cap straight from him. I'm assuming you mean this swimcap https://www.renderosity.com/mod/bcs/arcebus-swimcap-v4-a4/77290. Many times I've come across products that had been retired by Renderosity but the vendor was willing to sell them through paypal or some arrangement. That's why I hate Renderosity's clearance policy of just deleting items after a certain period of inactivity, lots of great stuff has been lost to us this way.