I made a Digikey BOM with what I think should be equivalent parts. The total is about $41 in parts, with $20 just in BNC connectors. This is about double what you listed from LCSC, which is sort of what I expected.
| ID | Name | Designator | Quantity | MFG | MFG Part Number |
| 1 | 1N4148 | D4,D5,D8,D9,D10,D13,D14,D15 | 8 | SMC | 1N4148W |
| 2 | XH-3A_C722863 | HIGHPOT,HIGHCUR,LOWCUR,LOWPOT,BIAS | 5 | | |
| 3 | 33u | C4,C5,C11,C12 | 4 | Panasonic | ECA-2EM330 |
| 4 | 10uF | C1,C2 | 2 | Cornell Dubilier | 106MMR100K |
| 5 | HDR-M-2.54_1x2 | EC | 1 | | |
| 6 | 100nF | C3,C6 | 2 | Kemet | MMK5104J100J01L16.5TR18 |
| 7 | C232A475J6SC000 | C7,C8,C9 | 3 | Epcos | B32522C0475J000 |
| 8 | 1uF | C10 | 1 | Panasonic| ECW-FD2W105Q1|
| 9 | 1N4004W | D1 | 1 | SMC | 1N4007FL |
| 10 | MM1Z10-C128709 | D2,D3,D6,D7 | 4 | Nexperia | PDZ10BGWX |
| 11 | 1N4148W_C432607 | D11,D12,D16,D17 | 4 | SMC | 1N4148W |
| 12 | 10k | R1,R3 | 2 | Stackpole | RMCF1206FT10K0 |
| 13 | 100k | R2,R4 | 2 | Stackpole | RMCF1206FT100K |
| 14 | Header-Male-2.54_1x3 | TEST | 1 | Adam Tech | PH1-03-UA |
| 15 | DOSIN-801-0030 | HC,HCUR,HP,HPOT,LC,LCUR,LP,LPOT | 8 | Molex | 731385033 |
I actually used the cheaper BNC connectors with plastic housings, RF1-01K-D-00-50-BK-HDW.
NOTE1: This was generated from the V4 design. I have not confirmed all these parts yet. Ordered but not yet received or assembled or tested. No guarantees they are actually fully equivalent yet.
Note2: Fixed 1uF cap part number. Previously listed 0.1uF.
Note3: Items 4 and 7 are either/or stuffing options. Item 3 is qty2 and optional.