Check out this vendor on Etsy!
Right now you can grab these Personalized Turkish Towel, Beach Or Hand Size Towel, Personalize Gift, Bachelorette Towel, Monogrammed Towel Gift for Her, Special Gift as low as $3.80. But the price for the personalized beach towel is $12.45.
The seller has fantastic reviews and shipping is FREE on orders of $35+. Lots of people appear to have used these for girls weekends or events like that!