Hello there!
We've just added the S377-34 with the 3030 spring strength option to our catalog. You can place an order directly on our website at your convenience.
If you have any questions just let us know!
Thank you for reaching out to us. It appears you don't have the Series 377 originally which explains why you're running into some trouble. The original balance in your photos is a match for our Series 380 or Series 385, depending on the depth of the bottom fitting. You'll need to measure as shown in the image below to determine the best match.
Our return policy can also be found here.
No problem! Thank you for your business and your kind words. Let me know if I can be of further assistance and I'd be happy to help!
